Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53f97aeb58a7c7b…

MALICIOUS

PDF

79.4 KB Created: 2021-01-12 05:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 45dedb88c9230b5da0a2f89827c6cf89 SHA-1: 60369e3039a400d155787c98313afa386450726e SHA-256: e53f97aeb58a7c7bdfe19fd1e1e9d1cb32772e121cab3e10dc2b61b49bde6062
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that directs users to a website offering a game download, which is a common lure for phishing or malware distribution. ClamAV and ML classifiers strongly indicate maliciousness, and the PDF_URI heuristic confirms the presence of an external link. The document body, though heavily obfuscated, appears to contain metadata related to the wkhtmltopdf tool and a date, suggesting it was programmatically generated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffnew.ru/wb?keyword=crazy%20for%20speed%20game%20download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385434/normal_5fc73d362702f.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/dYhgmuw/bifam.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/Ibiikha/world_soccer_league_scores.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/eYKLjaH/minecraft_mod_1._7_10_hello_neighbor.pdfIn PDF document text
    • https://site-1241159.mozfiles.com/files/1241159/makgeolli_mask_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/UiakYja/red_ball_3_volume_2.pdfIn PDF document text
    • https://site-1171584.mozfiles.com/files/1171584/korean_adverbs_list.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/jiEhija/hello_kitty_cafe_new_york_city.pdfIn PDF document text
    • https://site-1172435.mozfiles.com/files/1172435/5804948634.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/hcjeYnG/cnc_turning_programming_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/7wGkifQ/freeway_fury_alien_annihilation.pdfIn PDF document text
    • https://site-1167926.mozfiles.com/files/1167926/72005604182.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/definition_of_political_party.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/junabukodafak.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/korean_drama_subtitles_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/arcgis_server_10._1.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 5508 bytes
SHA-256: 3a466252de1fdb0d485506483df34c701efed58ac22ebaae1c6ca688ba1bab18
font_01_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 10416 bytes
SHA-256: 983fb89fb81003b7aefa759d6e6e99d911ea3aa3b7b849c0c070673b41d2db0c

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